Polycarbonate on the Elegoo Neptune 4 Pro
Yes, but it takes extra gear or care. The Neptune 4 with grippier extruder gearing. Same open frame.
Polycarbonate is tricky on the Elegoo Neptune 4 Pro
No enclosure on this printerPrinter
The Elegoo Neptune 4 Pro is open to the room, and Polycarbonate warps and cracks in open air. Small parts can survive; for anything bigger, add an enclosure (even a grow tent or a box over the printer helps).
Use the lower end of the bed rangePrinter
Some Polycarbonate spools ask for up to 120 °C on the bed; the Elegoo Neptune 4 Pro reaches 110 °C. Set the bed near 110 °C and add a glue stick if corners lift.
Keep the spool dryMaterial
Polycarbonate soaks up moisture from the air, and damp filament prints rough and stringy. If that happens, dry the spool at 80-90 °C for 6-8 h and store it sealed with desiccant.
Buying the CF version of Polycarbonate?
Carbon-fiber filament sands down the Elegoo Neptune 4 Pro’s stock nozzle. Plain Polycarbonate is fine; for the CF variant, fit a hardened steel nozzle first (a cheap swap).
Safe starting ranges for Polycarbonate as a family, not gospel. Each spool below has its exact manufacturer numbers, the dated source, and one-click slicer settings on its page.
Top Polycarbonate picks for the Elegoo Neptune 4 Pro
Editor-tested spools and Elegoo's own line: start here.
More Polycarbonate spools
54 Polycarbonate filaments in the catalog, popular brands first. See the full Polycarbonate list.